Merge pull request #12056 from ClickHouse/fix-11808

Fix defaultValueOfArgumentType

src/Functions/defaultValueOfArgumentType.cpp

@@ -22,6 +22,7 @@ public:
     }
 
     bool useDefaultImplementationForNulls() const override { return false; }
+    bool useDefaultImplementationForLowCardinalityColumns() const override { return false; }
 
     size_t getNumberOfArguments() const override
     {

tests/queries/0_stateless/01355_defaultValueOfArgumentType_bug.reference

+	LowCardinality(String)

tests/queries/0_stateless/01355_defaultValueOfArgumentType_bug.sql

+SELECT 
+    materialize(toLowCardinality('')) AS lc,
+    toTypeName(lc)
+WHERE lc = defaultValueOfArgumentType(lc)